The uninhabited void type for use in statically impossible cases.
The uninhabited type, enum Void { } is useful in dealing with cases you
know to be impossible. For instance, if you are implementing a trait which
allows for error checking, but your case always succeeds, you can mark the
error case or type as Void, signaling to the compiler it can never happen.
This crate also comes packed with a few traits offering extension methods to
Result<T, Void> and Result<Void, T>.
Use the crates.io repository; add this to your Cargo.toml along
with the rest of your dependencies:
[dependencies]
void = "1"Then, use Void in your crate:
extern crate void;
use void::Void;Jonathan Reem is the primary author and maintainer of void.
Licensed under either of
- Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
- MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)
at your option.
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.